Lance Creek is located at 43°1'56" North, 104°38'27" West (43.032500, -104.641111).

According to the United States Census Bureau, the city has a total area of 42.02 mi2 (108.84 km2). 42.01 mi2 (108.81 km2) of it is land and 0.01 mi2 (0.03 km2) of it is covered by water. The total area is 0.03% water.

Lance Creek is located in the Mountain Standard Time (MST) timezone, GMT-07:00. It observes Daylight Saving Time (DST).